‘Last time I saw him would have been Friday when I do the papers in the morning.

‘They looked fine. It would have been about 7.30am on Friday morning. I’d say hello and saw both parents.’

Suspect Jitendra was a watersports fanatic who posted on his Facebook profile pictures of him in a scuba diving gear while stating that he had ‘finally qualified as an ocean diver’ in April.

He is thought to be the chairman of the Friends of Thornton Grammar school, where his daughters Nisha and Trisha studied.

The husband and wife both worked for Bradford council as clerical staff.

Councillor David Green, leader of the local authority, said: ‘Local people are shocked and saddened by the news of this terrible event and our sympathy goes out to the wider family, friends and neighbours of this family.

‘The husband and wife of the family… both worked for Bradford Council and councillors and employees are very upset after hearing the dreadful news of their deaths.

‘Obviously, it would not be appropriate to comment further at this stage as the investigation into how it happened is continuing, but we would urge anyone who may have any information about this tragedy to contact the police immediately’.